/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package componentes;

import DTO.Usuario;
import com.google.gson.Gson;//http://blog.pontt.com/json-con-java/introduccion-java-y-json-primera-parte-con-ejemplo/
import java.io.IOException;
import java.io.PrintWriter;
import java.util.*;
import javax.faces.application.Application;
import javax.faces.context.FacesContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.sound.midi.Soundbank;
import tipos.UsuarioStatus;
import tipos.UsuarioTipo;
import utilidades.Hash;

/**
 *
 * @author acazares
 */
@WebServlet(name = "requestController", urlPatterns = {"/requestController.jsf"})
public class RequestController extends HttpServlet {
    
    private Gson gson;

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        
        //response.setContentType("text/html;charset=UTF-8");
        response.setContentType("text/plain;charset=UTF-8");
        gson = new Gson();
        PrintWriter out = response.getWriter();
        
        try {               
            String opcion = request.getParameter("action");
            
            if( opcion != null ){                
                
                if(opcion.equals("login")){
                    out.print( login(request) );
                }
                
                if(opcion.equals("logout")) {
                    logout(request); //out.print("ya");                    
                }
            }        
            
            
        } finally {            
            out.close();
        }
    }
    
    
    private String login(HttpServletRequest request){
        try{
            String user = request.getParameter("user");
            String pass = request.getParameter("pass");            

            if(user!=null && pass!=null && user.length()>0 && pass.length()>0){            
                HttpSession sesionActual = request.getSession();                
                
                DAO.UsuarioDAO dao = new DAO.UsuarioDAO();
                Usuario usuario = dao.getUsuarioByUserPass(user, Hash.md5(pass));
                
                if(usuario.isValid()){
                    sesionActual.setAttribute("usuario", usuario );
                    dao.updateLastLogin(usuario);
                    System.out.println("login starting: "+usuario.getId());                    
                }
                return gson.toJson( usuario );
            }
            return gson.toJson( new Usuario() );        
        }catch(Exception e){
            return "error: "+e;
        }
    }
    private void logout(HttpServletRequest request){  
        // consulta [invalidate]: http://manglar.uninorte.edu.co/bitstream/10584/2206/1/Frameworks%20de%20desarrollo%20sobre%20p%C3%A1ginas%20JSP.pdf
        HttpSession sesionActual = request.getSession();        
        sesionActual.invalidate();
        System.out.println("logout");
    }
    

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
